Question

We were lost in thought, so we wrer not aware ---was going on around

A what B of what Cof the thing D that

Answer 1

楼上很耐心，也还不错，不过千万别把自己想的当成英语语法规则。
从没有说因为是从句就必须把前面的介词去掉啊。

请看从google上搜索的例句，只取几个作为佐证而已：
Daniel was not aware of what was going on around him during that time.

As of yesterday, Mayra was still not talking and was not aware of what was going on around her, Rodriguez said.

He was not aware of what was going on around him.
他没意识到自己周围发生了什么事情。
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所以答案肯定只能是

B

汉语翻译是

我们那时太沉浸在自己的想法中，所以没有意识到周围发生了什么事情。

Answer 2

A

我们陷入沉思，没有意识到周围发生地事情。

空格处需要一个词既做从句was going on around的主语，又引导这个从句做be aware的宾语。有这种用法的只有what。

先排除D，因为D没有上述用法；再排除C，选C的话句中仍然缺少关系词。正确表达法应该是of the thing that。

be aware of sth. 意识到某事，of后一般接名词。

当后面跟从句时，要把of去掉。

Answer 3

选B.
Be aware of sth/doing sth 清楚知道...

试译：我们沉思着，以致于不知道周围在发生什么。